Pump impeller



FIG. 1 is a front elevational view of the pump impeller showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a bottom perspective view thereof; and,

FIG. 8 is a top perspective view thereof. 

CLAIM The ornamental design for a pump impeller, as shown and described. 